xml application advice

William Purcell flyeng4 at gmail.com
Wed Jun 10 18:39:33 CEST 2009


Scott David Daniels wrote:
> William Purcell wrote:
>> I am writing a application to calculate pressure drop for a piping
>> network.  Namely a building sprinkler system.  This will be a
>> command line program at first with the system described in xml....
> 
> If you are going to be doing a lot of tree walking, try etree.
> Simple example:
> 
>     import xml.etree.ElementTree as ET # or wherever you get ElementTree
> 
>     def find_remote_and_path(node, path):
>         for child in node:
>             for result in walks(child, path + [node]): yield result
>         if node.tag == 'node' and node.get('hydraulically_most_remote'
>                                            ) == 'True':
>             yield node, path
> 
> 
>     tree = ET.parse('ex.xml')
>     for node, path in find_remote_and_path(tree.getroot(), []):
>         for t in path:
>             print '    ', t.tag, t.get('id', '-')
>         print node.tag, ', '.join(sorted('%s=%r' % pair
>                                         for pair in node.items()))
> 
> 
> --Scott David Daniels
> Scott.Daniels at Acm.Org

Scott, Thanks for the reply.

I am having a little trouble finding where to import `walks` from.

Bill



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